"timestamp" key value update

In the payload examples, the values for the timestamp attributes were "CURRENT_TIME". As per the description for timestamp key in "Required key-value pairs" section, I have updated it to sample epoch time in milliseconds.

Author: sujitnewrelic

src/content/docs/data-apis/ingest-apis/metric-api/report-metrics-metric-api.mdx

@@ -40,7 +40,7 @@ Follow this example to send your first metric data points to New Relic:
                "name":"memory.heap", 
                "type":"gauge", 
                "value":2.3, 
-               "timestamp":CURRENT_TIME, 
+               "timestamp":1704431659000, 
                "attributes":{"host.name":"dev.server.com"} 
            }] 
        }]'
@@ -194,7 +194,7 @@ The JSON payload uses this structure:
             "name": "service.errors.all",
             "type": "count",
             "value": 15,
-            "timestamp": CURRENT_TIME,
+            "timestamp": 1707110059000,
             "interval.ms": 10000,
             "attributes": {
               "service.response.statuscode": "400",
@@ -206,7 +206,7 @@ The JSON payload uses this structure:
             "name": "service.memory",
             "type": "gauge",
             "value": 2.7,
-            "timestamp": CURRENT_TIME,
+            "timestamp": 1707110059000,
             "attributes": {
               "host.name": "dev.server.com",
               "app.name": "foo"
@@ -324,7 +324,7 @@ Each metric data point map in the `metrics` array uses the following key-value s
             "name": "cache.misses",
             "type": "count",
             "value": 15,
-            "timestamp": CURRENT_TIME,
+            "timestamp": 1709615659000,
             "interval.ms": 10000,
             "attributes": {
               "cache.name": "myCache",
@@ -335,7 +335,7 @@ Each metric data point map in the `metrics` array uses the following key-value s
             "name": "temperature", 
             "type": "gauge", 
             "value": 15, 
-            "timestamp": CURRENT_TIME, 
+            "timestamp": 1709615659000, 
             "attributes": { 
               "city": "Portland", 
               "state": "Oregon" 
@@ -351,7 +351,7 @@ Each metric data point map in the `metrics` array uses the following key-value s
               "max": 0.001708826
             },
             "interval.ms": 10000, 
-            "timestamp": CURRENT_TIME,
+            "timestamp": 1709615659000,
             "attributes": {
               "host.name": "dev.server.com",
               "app.name": "foo"